CPU fan sudden/momentary increase then decrease. Tags: CPUs Processors Intel Last response: December 6, 2010 1:43 AM in CPUs Share anonymous1986 December 5, 2010 6:39:43 PM Hi, very occasionally (only ever heard it twice) I hear my stock Intel CPU fan rev up (saw 1800rpm on intel desktop utilities) and then a second or less later go back to its normal speed (1300 rpm). Just wondering if this is normal behaviour? The processor is an i5 760, the computer was idle (40C processor) when it happened. Thanks for any suggestions! More about : cpu fan sudden momentary increase decrease beanoslim a b à CPUs December 5, 2010 9:16:16 PM Intel has Speedstep technology that automatically increases and decreases the fan speed in accordance with the cpu heat. It can be enabled and disabled in the bios but it sounds like its working ok, you can also change settings in the bios to have it react to your prefered temp settings if you want. m 0 l wa1 a b à CPUs December 6, 2010 1:29:45 AM That's a normal, just like beanoslim said above. If your stock cooler make loud noise then you can buy an aftermarket cooler for just about $50-$60. m 0 l Can't find your answer ? Ask ! Get the answer Dylan80 December 6, 2010 1:43:19 AM Yep.... BIOS setting that auto-controls the fan speed when your processor gets too hot I guess. Press the F8/F11 key (whichever your motherboard says when you start up) and fiddle (VERYYYY CAREFULLY) with the BIOS, looking for a fan speed, or auto-temperature setting m 0 l Can't find your answer ? Ask ! Publish Related resources Does increase in CPU Heat decrease CPU speed? Forum SolvedIncrease in temp when the CPU load decreases? Forum Solvedhow to increase cpu fan speed Forum SolvedHow to increase CPU fan speed? Forum So does a higher refresh rate increase or decrease input lag? Forum SolvedNOT SOLVED!: Why won't voltage decrease or increase? Forum Would CPU load increase with decreasing clock speed. Forum unable to increase and decrease brightness in my laptop Forum I can't drag and move a border to increase/decrease size like I always have. Windown 7 - I can drag and drop icons etc. Help Forum hi i'm using hp vavilionG7 notebook, i just install it with window7 ultimate but there is no where to increase or decrease dis Forum How do I increase the speed of my CPU fan? Forum SolvedVCore significant increase and decrease Forum Memory Performance increase/ decrease Forum increase cpu fan speed Forum CPU heatsink fan speeds up without major increase in temps Forum SolvedIf I get a better graphics card will it decrease the fan? Forum Solvedwhy does size of screen decrease by increasing resolution? Forum CPU fan facing the wrong way - can it cause drastic temp increase? Forum How to increase CPU fan speed? Forum SolvedWill increasing the fan speed lower my cpu temp? Forum More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !